Polyacrylamide is a kind of linear organic polymer, but also a kind of polymer flocculant product for water treatment. It can absorb suspended particles in water, bridge the connection between particles, and make the fine particles form relatively large flocs, and accelerate the precipitation speed. This process is called flocculation. Due to its good flocculation effect, PAM is widely used in sewage treatment.
1. Its purifying effect on low-temperature, low-turbidity and heavily organic-polluted raw water is much better than other organic flocculant, furthermore, the treatment cost is lowered by 20%-80%. 2. It can lead to quick formation of flocculant (especially at low temperature) with big size and rapid precipitation service life of cellular filter of sedimentation basin. 3. It can adapt to a wide range of pH value (5−9), and can reduce the pH value and basicity after processing. 4. The dosage is smaller than that of other flocculants. It has wide adaptability to the waters at different temperatures and at different regions. 5. Higher basicity, lower corrosive, easy for operation, and long-term use of non-occlusion.
In water treatment, coagulation flocculation involves the addition of compounds that promote the clumping of fines into larger floc so that they can be more easily separated from the water. Coagulation is a chemical process that involves neutralization of charge ... Coagulation is affected by the type of coagulant used, its dose and mass; pH
flocculation are used to separate the suspended solids portion from the water. ... Coagulant chemicals with charges opposite those of the suspended solids are added to the ... These stages are followed by sedimentation, and then filtration